Patrick



'(No Model.)

H. F. FITZPATRICK.

PNEUMATIC PRES SURE REGULATOR.

No. 252,754, Patented Jan. 24,1882. I

Mk W Zizzazsaz ava/afar N. PETERS. mammogram", Washington. D. C

PATENT FHQEO HUGH F. FITZPATRICK, OF N E W YORK, N. Y.

PNEUMATIC-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent No. 252,754, dated January 24, 1882. I

- Application filed February 12, 1881. (No model.) i

I PATRICK, of the city, county, and State of New York, have invented a new and useful Improvement in Pneumatic-Pressure Regulators, of which the following is a specification.

My invention relates to apparatus in which pneumatic pressure for raising liquid from a.- closcd tank, keg, or other vessel is automatically supplied to the said vessel by a hydraulic air-compressor as the liquid is drawn off,

the object of the invention being to provide an improved device, more sensitive, durable, and working with less friction than those heretofore made, for gaging and maintaining constant a certain suitable degree of pressure in the said vessel regardless of any excess of pressure produced by the hydraulic force in the automatic air-compressor.

The invention consists in an automatic regulator adapted to be attached to the dischargepipe of the air-compressor and the inlet-pipe of theliquid-containing vessel, and constructed as hereinafter described and claimed.

In the accompanyingdrawings, Fignrel represents in full size a longitudinal vertical section (on the line 00 w of Fig. 2) of an automatic 'regulator constructed according to my invention. Fig. 2 is a horizontal section of the same, taken on the line g g of Fig. 1.

Like letters of reference indicate like parts. When the compressor is connected directly to the liquid-cask, and the discharge-cock of the latter is kept closed for a while, the compressor will keep working until the pressure in the cask equals that due to the weight of the entire column of water acting on the compressor. In order to prevent such excess-and unwarranted variation of pressurein the cask, and to keep it moderate and constant there regardless of the increase of pressure in the compressor, I connect the regulator to the pipe leading from the compressor to the liquid-cask in such manner that the air, before entering the cask, must pass through the regulator. This latter consists of a small box of two contiguous chambers, A and B, the chamber B inclosing the inlet-valve and the chamber A being covered with a flexible diaphragm, H, clamped air-tight upon it by a metallic cover, 0, having a round central opening.

The bottom D of the box is a separate piece the middle portion of the diaphragm H and to g a pin or stud, I, by screws 6, the center of the diaphragm being clamped between the stud and the lever. The stud I projects up through the opening in the rigid cover 0, and a lever, J, provided with an adjustable weight, K, and pivoted to a lug, 0, upon the cover 0, rests upon the upper end of the stud I, the latter entering a small recess in the under side of the lever J, to keep the two together in proper working contact. The lever J is further guided between two pins or lugs,j,' to keep it from lateral deflection, said lugs being formed on or attached to the cover 0 diametrically opposite to the log 0. The inlet E and outlet F have threaded coupling-nipples projecting laterally beyond the box B A, as shown in the drawings,

for adapting the regulator to be attached to the pipe leading from the air-compressor to the liquid-containing cask.

When the parts are properly bolted and attached together, the rubber block g in the free end of lever G will be in position above the vertical end of the inlet-passage E to act as a valve upon the nipple e as its valveseatand close the inlet E when the other end of the lever G is raised sufliciently by the inside pressure upon the diaphragm caused by back-pressure from the cask through the passage F.

In regulators as heretofore constructed an oscillating rotary valve has been operated by the diaphragm by external connection to the weighted lever J, thus incurring the liability of the compressed air to leak through the valve into the atmosphere, a great deal of friction to preventsuch leakage, and much motion of the lever foroperating the valve, all of which increases the necessary total of the strain upon the diaphragm and requires the same to be made unduly largein proportion to its strength or power of resistance, thereby greatly lessening its durability.

In my present improvement it is obvious that the aforesaidleakage can never occur, the valve moves practically without friction, and is operated by only a very slight movement of the diaphragm, the proportion of leverage between the valve and diaphragm can be varied indefinitely'without changing their positions by simply changing the fulcrum--that is, making a new fulcrum nearer to or farther from the nipple eand the diaphragm can be made of the smallest size best calculated to insure its durability. The pressure is gaged, as usual, by adjusting the sliding weight K upon the lever J. The partition between the chambers A and Bis slotted at a to receive and allow of movement of the lever G and free passage of the compressed air.

By making the valve-channels, the nipple c, and the fulcrum-lug (1 parts of a bottom plate, D, made separate from the box A, and the nipple c slightly projecting above the surface of the plate D, the construction is greatly simplified, the manipulations of attaching and adjusting the valve-lever G are much facilitated, and

the needful movement being very slight, the

valve 9 and the diaphragm H can be attached directly to the lever G without links and pivotal joints.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a pressureregnlator, the separately-made bottom plate, D, provided with the valve-channels E F, the inlet valve seat or nipple e, raised above the surface of said plate, and pivoting-lug d, in combination with the valve-lever G, fulcrumed to the said lug d and provided with valve 9 and diaphragm H, secured directly to the ends of said lever, and with the covers B O, stud I, and weighted lever J, all constructed and operating as shown and described.

llUGll FRANCIS FI'IZPATRICK.

Wdnesses:

A. W. ALMQVIS'I, JOHN M. STELLE. 

